7=x(8-x)

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Solution for 7=x(8-x) equation:


Simplifying
7 = x(8 + -1x)
7 = (8 * x + -1x * x)
7 = (8x + -1x2)

Solving
7 = 8x + -1x2

Solving for variable 'x'.

Reorder the terms:
7 + -8x + x2 = 8x + -8x + -1x2 + x2

Combine like terms: 8x + -8x = 0
7 + -8x + x2 = 0 + -1x2 + x2
7 + -8x + x2 = -1x2 + x2

Combine like terms: -1x2 + x2 = 0
7 + -8x + x2 = 0

Factor a trinomial.
(1 + -1x)(7 + -1x) = 0

Subproblem 1

Set the factor '(1 + -1x)' equal to zero and attempt to solve: Simplifying 1 + -1x = 0 Solving 1 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + -1x = 0 + -1 Combine like terms: 1 + -1 = 0 0 + -1x = 0 + -1 -1x = 0 + -1 Combine like terms: 0 + -1 = -1 -1x = -1 Divide each side by '-1'. x = 1 Simplifying x = 1

Subproblem 2

Set the factor '(7 + -1x)' equal to zero and attempt to solve: Simplifying 7 + -1x = 0 Solving 7 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '-7' to each side of the equation. 7 + -7 + -1x = 0 + -7 Combine like terms: 7 + -7 = 0 0 + -1x = 0 + -7 -1x = 0 + -7 Combine like terms: 0 + -7 = -7 -1x = -7 Divide each side by '-1'. x = 7 Simplifying x = 7

Solution

x = {1, 7}

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